refactor: make EnvAdapter.reflect a shared default (fixes dropped reflect kwargs)

[imshunsuke]

All six adapters duplicated an identical reflect() that delegates to
run_minibatch_reflect. The copies had drifted: OfficeQA/DocVQA silently
dropped meta_skill_context and ALFWorld dropped update_mode, so those
analysts ran without inputs every other benchmark receives (active under the
default use_meta_skill: true).

This moves the delegation into EnvAdapter.reflect as one default that
forwards all kwargs uniformly, and deletes the six overrides. reflect is no
longer abstract — adapters inherit it and override only for custom logic.

Net −225 lines. Behavior change: OfficeQA/DocVQA/ALFWorld reflect now receive
the kwargs they previously dropped; the three already-correct benchmarks are
unaffected.

🤖 Generated with Claude Code

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